Geothlypis philadelphia
Drawn from open occurrence records in and around Isle Royale National Park, aggregated onto a 25 km grid. A cell is matched by its centre, which can sit up to 16 km outside the boundary, so this covers the surrounding country too.
Occurrence records measure where people looked and found something, which is not the same as where the animal is. This is a relative likelihood, not a probability.
Records exist for May, June, July, August and September, with the widest coverage in May, June, July, August and September. A quiet month can mean the animal was absent, or that nobody was looking.
A grid cell is a square of the map, not a sighting: 1 square of 25 km carry records for Mourning Warbler in and around Isle Royale National Park, and the 334 records behind them were collected by other people and published openly. Nothing here counts animals, and a place with more records is not always a place with more animals.
Osa Peninsula, Arenal and Corcovado are the three atlas places where the Mourning Warbler is recorded. Its records concentrate in the United States, Canada, Costa Rica, Colombia and Panama. The atlas holds about 138,000 open records of this bird from six countries, and the map shows where these sightings gather.
It is the only species with an atlas page recorded in and around Isle Royale National Park.
The full atlas page, and everywhere else it is recorded